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ALSA: usb-audio: fix rate_list memory leak

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The array of sample rates is reallocated every time when opening
the PCM device, but was freed only once when unplugging the device.

Reported-by: "Alexander E. Patrakov" <patrakov@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch 2012-05-18 18:00:43 +02:00 committed by Takashi Iwai
parent adcc70b249
commit 5cd5d7c449
1 changed files with 3 additions and 0 deletions
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3
sound/usb/pcm.c
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@ -788,6 +788,9 @@ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
int count = 0, needs_knot = 0;
int err;
kfree(subs->rate_list.list);
subs->rate_list.list = NULL;
list_for_each_entry(fp, &subs->fmt_list, list) {
if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
return 0;